CN204759876U - Contrast experimental apparatus of sodium carbonate, sodium bicarbonate and hydrochloric acid reaction - Google Patents
Contrast experimental apparatus of sodium carbonate, sodium bicarbonate and hydrochloric acid reaction Download PDFInfo
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- CN204759876U CN204759876U CN201520543816.9U CN201520543816U CN204759876U CN 204759876 U CN204759876 U CN 204759876U CN 201520543816 U CN201520543816 U CN 201520543816U CN 204759876 U CN204759876 U CN 204759876U
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- shaped pipe
- test tube
- tool
- hydrochloric acid
- rubber stopper
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- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 title claims abstract description 84
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 title claims abstract description 74
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 title claims abstract description 66
- 229910000030 sodium bicarbonate Inorganic materials 0.000 title claims abstract description 42
- 235000017557 sodium bicarbonate Nutrition 0.000 title claims abstract description 42
- 229910000029 sodium carbonate Inorganic materials 0.000 title claims abstract description 33
- 238000006243 chemical reaction Methods 0.000 title claims abstract description 24
- 238000012360 testing method Methods 0.000 claims abstract description 62
- 239000000839 emulsion Substances 0.000 claims abstract description 20
- 239000012188 paraffin wax Substances 0.000 claims abstract description 11
- 239000007787 solid Substances 0.000 claims description 32
- 239000007788 liquid Substances 0.000 claims description 22
- 238000002474 experimental method Methods 0.000 claims description 19
- 235000015112 vegetable and seed oil Nutrition 0.000 claims description 15
- 239000008158 vegetable oil Substances 0.000 claims description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 10
- 239000000203 mixture Substances 0.000 claims description 3
- 230000007423 decrease Effects 0.000 claims 1
- 230000000630 rising effect Effects 0.000 claims 1
- 239000000463 material Substances 0.000 abstract description 7
- 230000007547 defect Effects 0.000 abstract description 6
- 229940126589 solid medicine Drugs 0.000 abstract description 2
- UIIMBOGNXHQVGW-DEQYMQKBSA-M Sodium bicarbonate-14C Chemical compound [Na+].O[14C]([O-])=O UIIMBOGNXHQVGW-DEQYMQKBSA-M 0.000 abstract 1
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 18
- 239000001569 carbon dioxide Substances 0.000 description 9
- 229910002092 carbon dioxide Inorganic materials 0.000 description 9
- 239000000126 substance Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 2
- 241000973497 Siphonognathus argyrophanes Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
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- Investigating Or Analyzing Non-Biological Materials By The Use Of Chemical Means (AREA)
Abstract
(B, ) the utility model provides a contrast experimental apparatus of sodium carbonate, sodium bicarbonate and hydrochloric acid reaction, its main characterized in that: it is by a first utensil test tube (b) (b) 1 (b) (b) that is equipped with sodium bicarbonate, first rubber stopper (b) (b) 2 (b) (b), the first syringe (b) (b) 3 (b) (b) of hydrochloric acid is equipped with, first emulsion tube (b) (b) 4 (b) (b), the bottom is with (b) (b) U (b) (b) venturi tube (b) (b) 5 (b) (b) of the both ends area branch pipe of paraffin shutoff, second rubber stopper (b) (b) 6 (b) (b), first long neck funnel (b) (b) 7 (b) (b), third rubber stopper (b) (b) 8 (b) (b), second long neck funnel (b) (b) 9 (b) (b), second emulsion tube (b) (b) 10 (b) (b), a second utensil test tube (b) (b) 11 (b) (b) of sodium carbonate is equipped with, fourth rubber stopper (b) (b) 12 (b) (b), the second syringe (b) (b) 13 (b) (b) that is equipped with hydrochloric acid is constituteed. (B, ) (b) textbook experimental apparatus has the defect: putting the solid medicine in the balloon, being difficult for empting totally, experimental error is great, the balloon material is inhomogeneous, and coefficient of expansion is different, and experimental error is great. The utility model discloses the material is easy, the equipment is easy, easy and simple to handle, the phenomenon is obvious, can overcome the defect of textbook device completely. (B, )
Description
one, technical field
the utility model belongs to chemical field, relates to a kind of chemical experiment device, particularly for demonstrating the experiment of sodium carbonate, sodium bicarbonate and hydrochloric acid reaction on senior chemistry textbook.
two, background technology
people teaches the experiment of the required teaching material of edition senior chemistry [1] first 32 pages of sodium carbonate, sodium bicarbonate and hydrochloric acid reactions, demonstrate like this in textbook: in two test tubes, add 3mL watery hydrochloric acid respectively, the tiny balloons two being respectively equipped with 0.3g sodium carbonate and sodium bicarbonate powder is enclosed within two test tube mouths respectively.Sodium carbonate in balloon and sodium bicarbonate are poured in test tube simultaneously, compares the speed that they release carbon dioxide.Testing the conclusion drawn thus is: sodium carbonate and sodium bicarbonate can react with watery hydrochloric acid, but sodium bicarbonate and watery hydrochloric acid react and reacts much violent than sodium carbonate and watery hydrochloric acid.Do experiment existing defects like this in textbook: 1, be placed in balloon by solid medicine, not easily topple over clean, cause experimental error larger.2, balloon material is uneven, and expansion coefficient is different, causes experimental error large.
three, utility model content
the utility model object is the contrast experiment's device providing a kind of sodium carbonate, sodium bicarbonate and hydrochloric acid reaction.Use the utility model to do the experiment of sodium carbonate, sodium bicarbonate and hydrochloric acid reaction, material is easy to get, it is easy to assemble, easy and simple to handle, phenomenon obvious, can overcome the defect of textbook experiment device completely.
the purpose of this utility model realizes by the following method:
a kind of sodium carbonate, contrast experiment's device of sodium bicarbonate and hydrochloric acid reaction, be primarily characterized in that: it props up test tube (1) by the first tool that appropriate sodium bicarbonate solid (14) is housed, first rubber stopper (2), first syringe (3) of hydrochloric acid is housed, first emulsion tube (4), the bottom U-shaped pipe (5) of paraffin (16) shutoff two end band arm, second rubber stopper (6), first long neck funnel (7), 3rd rubber stopper (8), second long neck funnel (9), second emulsion tube (10), the second tool that proper amount of sodium carbonate solid (15) is housed props up test tube (11), 4th rubber stopper (12), second syringe (13) composition of hydrochloric acid is housed.
paraffin (16) is positioned at the bottom of the U-shaped pipe (5) of two end band arms, and the U-shaped pipe (5) of two end band arms is divided into left and right two parts.The left end arm that the first tool that appropriate sodium bicarbonate solid (14) is housed is propped up the arm of test tube (1) and the U-shaped pipe (5) of two end band arms by the first emulsion tube (4) couples together; The right-hand member arm that the second tool that appropriate sodium bicarbonate solid (15) is housed is propped up the arm of test tube (11) and the U-shaped pipe (5) of two end band arms by the second emulsion tube (10) couples together.The first tool that the first rubber stopper (2) jam-pack with the first syringe (3) is equipped with appropriate sodium bicarbonate solid (14) props up the mouth of pipe of test tube (1); The second tool that the 4th rubber stopper (12) jam-pack with the second syringe (13) is equipped with proper amount of sodium carbonate solid (15) props up the mouth of pipe of test tube (11).Water is equipped with at the two ends, left and right of the U-shaped pipe (5) of two end band arms, the water surface covers one deck vegetable oil, and liquid level is a little less than the arm at U-shaped pipe (5) two ends.The left end mouth of pipe of the U-shaped pipe (5) of the second rubber stopper (6) the jam-pack two end band arm with the first long neck funnel (7), the lower end mouth of pipe of the first long neck funnel (7) is inserted into bottom the left end of U-shaped pipe (5) of two end band arms; The right-hand member mouth of pipe of the U-shaped pipe (5) of the 3rd rubber stopper (8) the jam-pack two end band arm with the second long neck funnel (9), the lower end mouth of pipe of the second long neck funnel (9) is inserted into bottom the right-hand member of U-shaped pipe (5) of two end band arms.
experimentation: connect instrument, the impermeability of testing fixture.To pour into after appropriate melted paraffin wax in the U-shaped pipe (5) of two end band arms, make paraffin (16) be positioned at the bottom of the U-shaped pipe (5) of two end band arms, the U-shaped pipe (5) of two end band arms is divided into left and right two parts.Appropriate sodium bicarbonate solid (14) is loaded in the first tool props up test tube (1); Load and proper amount of sodium carbonate solid (15) in the second tool props up test tube (11), sodium bicarbonate is equal with the amount of substance of sodium carbonate.The left end arm with the first emulsion tube (4) the first tool that appropriate sodium bicarbonate solid (14) is housed being propped up the arm of test tube (1) and the U-shaped pipe (5) of two end band arms couples together; The right-hand member arm with the second emulsion tube (10) the second tool that appropriate sodium bicarbonate solid (15) is housed being propped up the arm of test tube (11) and the U-shaped pipe (5) of two end band arms couples together.Draw appropriate hydrochloric acid with the first syringe (3), then use the first tool that the first rubber stopper (2) jam-pack of band first syringe (3) is equipped with appropriate sodium bicarbonate solid (14) to prop up the mouth of pipe of test tube (1); Draw the hydrochloric acid with the first syringe (3) inner same volume, same concentrations with the second syringe (13), prop up the mouth of pipe of test tube (11) with the second tool that the 4th rubber stopper (12) jam-pack of band second syringe (13) is equipped with proper amount of sodium carbonate solid (15).Two ends, left and right toward the U-shaped pipe (5) of two end band arms add water, and then instill several vegetable oil, make vegetable oil cover on the water surface, liquid level is a little less than the arm at U-shaped pipe (5) two ends.With the left end mouth of pipe of the U-shaped pipe (5) of the second rubber stopper (6) the jam-pack two end band arm of band first long neck funnel (7), the lower end mouth of pipe of the first long neck funnel (7) is inserted into bottom the left end of U-shaped pipe (5) of two end band arms; With the right-hand member mouth of pipe of the U-shaped pipe (5) of the 3rd rubber stopper (8) jam-pack two end band arm of band second long neck funnel (9), the lower end mouth of pipe of the second long neck funnel (9) is inserted into bottom the right-hand member of U-shaped pipe (5) of two end band arms.During experiment, right-hand man presses the piston of two syringes simultaneously, make the first syringe (3), the inner hydrochloric acid of second syringe (13) all enters the first tool respectively and props up test tube (1) and the second tool props up in test tube (11), at this moment can see that two tools prop up in test tube and all produce a large amount of bubble, first tool props up the left end that the gas produced in test tube (1) enters the U-shaped pipe (5) of two end band arms, because the carbon dioxide produced is insoluble to vegetable oil, also not with vegetable oil reaction, along with air pressure in U-shaped pipe (5) left end pipe increases, the liquid level of U-shaped pipe (5) left end of two end band arms declines, liquid level in first long neck funnel (7) rises, second tool props up U-shaped pipe (5) right-hand member that the gas produced in test tube (11) enters two end band arms, because the carbon dioxide produced is insoluble to vegetable oil, also not with vegetable oil reaction, along with air pressure in U-shaped pipe (5) pipe increases, the liquid level of U-shaped pipe (5) right-hand member of two end band arms also declines, and the liquid level in the second long neck funnel (9) rises.And can see that the liquid level in the first long neck funnel (7) rises soon than the liquid level in the second long neck funnel (9), this absolutely prove the first tool prop up speed ratio second tool that hydrochloric acid and reaction of sodium bicarbonate in test tube (1) produce carbon dioxide prop up the middle hydrochloric acid of test tube (11) and sodium carbonate react produce carbon dioxide speed greatly, that is the reaction of propping up in test tube (1) of the first tool is fiercer.After reaction stops, the liquid level in the first long neck funnel (7) and the second long neck funnel (9) is equal, and it is equal that this explanation two tools prop up the gas volume produced in test tube.
the beneficial effects of the utility model are: use the utility model to do the experiment of sodium carbonate, sodium bicarbonate and hydrochloric acid reaction, material is easy to get, easy and simple to handle, phenomenon obvious, can overcome the defect of textbook device completely, device is reusable.The utility model is not only applicable to classroom does lecture experiment, is also applicable to student and does grouping experiment.
four, accompanying drawing explanation
fig. 1 is structural drawing of the present utility model.
mark in figure represents respectively:
u-shaped pipe (6) second rubber stopper (7) first long neck funnel (8) the 3rd rubber stopper (9) second long neck funnel (10) second emulsion tube (11) second tool that (1) first tool props up test tube (2) first rubber stopper (3) first syringe (4) first emulsion tube (5) two end band arm props up test tube (12) the 4th rubber stopper (13) second syringe (14) sodium bicarbonate solid (15) sodium carbonate solid (16) paraffin
five, embodiment
below in conjunction with embodiment, the utility model is described in further detail:
a kind of sodium carbonate, contrast experiment's device of sodium bicarbonate and hydrochloric acid reaction, be primarily characterized in that: it props up test tube (1) by the first tool that appropriate sodium bicarbonate solid (14) is housed, first rubber stopper (2), first syringe (3) of hydrochloric acid is housed, first emulsion tube (4), the bottom U-shaped pipe (5) of paraffin (16) shutoff two end band arm, second rubber stopper (6), first long neck funnel (7), 3rd rubber stopper (8), second long neck funnel (9), second emulsion tube (10), the second tool that proper amount of sodium carbonate solid (15) is housed props up test tube (11), 4th rubber stopper (12), second syringe (13) composition of hydrochloric acid is housed.
paraffin (16) is positioned at the bottom of the U-shaped pipe (5) of two end band arms, and the U-shaped pipe (5) of two end band arms is divided into left and right two parts.The left end arm that the first tool that appropriate sodium bicarbonate solid (14) is housed is propped up the arm of test tube (1) and the U-shaped pipe (5) of two end band arms by the first emulsion tube (4) couples together; The right-hand member arm that the second tool that appropriate sodium bicarbonate solid (15) is housed is propped up the arm of test tube (11) and the U-shaped pipe (5) of two end band arms by the second emulsion tube (10) couples together.The first tool that the first rubber stopper (2) jam-pack with the first syringe (3) is equipped with appropriate sodium bicarbonate solid (14) props up the mouth of pipe of test tube (1); The second tool that the 4th rubber stopper (12) jam-pack with the second syringe (13) is equipped with proper amount of sodium carbonate solid (15) props up the mouth of pipe of test tube (11).Water is equipped with at the two ends, left and right of the U-shaped pipe (5) of two end band arms, and the water surface drips several vegetable oil, and liquid level is a little less than the arm at U-shaped pipe (5) two ends.The left end mouth of pipe of the U-shaped pipe (5) of the second rubber stopper (6) the jam-pack two end band arm with the first long neck funnel (7), the lower end mouth of pipe of the first long neck funnel (7) is inserted into bottom the left end of U-shaped pipe (5) of two end band arms; The right-hand member mouth of pipe of the U-shaped pipe (5) of the 3rd rubber stopper (8) the jam-pack two end band arm with the second long neck funnel (9), the lower end mouth of pipe of the second long neck funnel (9) is inserted into bottom the right-hand member of U-shaped pipe (5) of two end band arms.
using method of the present utility model: connect instrument, the impermeability of testing fixture.To pour into after appropriate melted paraffin wax in the U-shaped pipe (5) of two end band arms, make paraffin (16) be positioned at the bottom of the U-shaped pipe (5) of two end band arms, the U-shaped pipe (5) of two end band arms is divided into left and right two parts.Appropriate sodium bicarbonate solid (14) is loaded in the first tool props up test tube (1); Load and proper amount of sodium carbonate solid (15) in the second tool props up test tube (11), sodium bicarbonate is equal with the amount of substance of sodium carbonate.The left end arm with the first emulsion tube (4) the first tool that appropriate sodium bicarbonate solid (14) is housed being propped up the arm of test tube (1) and the U-shaped pipe (5) of two end band arms couples together; The right-hand member arm with the second emulsion tube (10) the second tool that appropriate sodium bicarbonate solid (15) is housed being propped up the arm of test tube (11) and the U-shaped pipe (5) of two end band arms couples together.Draw appropriate hydrochloric acid with the first syringe (3), then use the first tool that the first rubber stopper (2) jam-pack of band first syringe (3) is equipped with appropriate sodium bicarbonate solid (14) to prop up the mouth of pipe of test tube (1); Draw the hydrochloric acid with the first syringe (3) inner same volume, same concentrations with the second syringe (13), prop up the mouth of pipe of test tube (11) with the second tool that the 4th rubber stopper (12) jam-pack of band second syringe (13) is equipped with proper amount of sodium carbonate solid (15).Two ends, left and right toward the U-shaped pipe (5) of two end band arms add water, and then instill several vegetable oil toward two ends, make vegetable oil cover on the water surface, make liquid level a little less than the arm at U-shaped pipe (5) two ends.With the left end mouth of pipe of the U-shaped pipe (5) of the second rubber stopper (6) the jam-pack two end band arm of band first long neck funnel (7), the lower end mouth of pipe of the first long neck funnel (7) is inserted into bottom the left end of U-shaped pipe (5) of two end band arms; With the right-hand member mouth of pipe of the U-shaped pipe (5) of the 3rd rubber stopper (8) jam-pack two end band arm of band second long neck funnel (9), the lower end mouth of pipe of the second long neck funnel (9) is inserted into bottom the right-hand member of U-shaped pipe (5) of two end band arms.During experiment, right-hand man presses the piston of two syringes simultaneously, make the first syringe (3), the inner hydrochloric acid of second syringe (13) all enters the first tool respectively and props up test tube (1) and the second tool props up in test tube (11), at this moment can see that two tools prop up in test tube and all produce a large amount of bubble, first tool props up the left end that the gas produced in test tube (1) enters the U-shaped pipe (5) of two end band arms, because the carbon dioxide produced is insoluble to vegetable oil, also not with vegetable oil reaction, along with air pressure in the left end pipe of U-shaped pipe (5) increases, the liquid level of U-shaped pipe (5) left end of two end band arms declines, liquid level in first long neck funnel (7) rises, second tool props up the right-hand member that the gas produced in test tube (11) enters the U-shaped pipe (5) of two end band arms, because the carbon dioxide produced is insoluble to vegetable oil, also not with vegetable oil reaction, along with air pressure in U-shaped pipe (5) pipe increases, the liquid level of U-shaped pipe (5) right-hand member of two end band arms also declines, and the liquid level in the second long neck funnel (9) rises.And can see that the liquid level in the first long neck funnel (7) rises soon than the liquid level in the second long neck funnel (9), this absolutely prove the first tool prop up speed ratio second tool that hydrochloric acid and reaction of sodium bicarbonate in test tube (1) produce carbon dioxide prop up the middle hydrochloric acid of test tube (11) and sodium carbonate react produce carbon dioxide speed greatly, that is the reaction of propping up in test tube (1) of the first tool is fiercer.After reaction stops, the liquid level in the first long neck funnel (7) and the second long neck funnel (9) is equal, and it is equal that this explanation two tools prop up the gas volume produced in test tube.The utility model has the advantages that: material is easy to get, easy and simple to handle, phenomenon obvious, can overcome the defect of textbook device completely, and device is reusable.The utility model is not only applicable to classroom does lecture experiment, is also applicable to student and does grouping experiment.
Claims (2)
1. a sodium carbonate, contrast experiment's device of sodium bicarbonate and hydrochloric acid reaction, be primarily characterized in that: it props up test tube (1) by the first tool that sodium bicarbonate solid (14) is housed, first rubber stopper (2), first syringe (3) of hydrochloric acid is housed, first emulsion tube (4), the U-shaped pipe (5) of two end band arms, second rubber stopper (6), first long neck funnel (7), 3rd rubber stopper (8), second long neck funnel (9), second emulsion tube (10), the second tool that sodium carbonate solid (15) is housed props up test tube (11), 4th rubber stopper (12), second syringe (13) composition of hydrochloric acid is housed, the bottom of the U-shaped pipe (5) of paraffin (16) shutoff two end band arm, water is equipped with at the two ends of the U-shaped pipe (5) of two end band arms, the water surface covers one deck vegetable oil, first emulsion tube (4) connects the left end arm that the first tool that sodium bicarbonate solid (14) is housed props up the arm of test tube (1) and the U-shaped pipe (5) of two end band arms, second emulsion tube (10) connects the right-hand member arm that the second tool that sodium bicarbonate solid (15) is housed props up the arm of test tube (11) and the U-shaped pipe (5) of two end band arms, the first tool that the first rubber stopper (2) jam-pack with the first syringe (3) is equipped with sodium bicarbonate solid (14) props up the mouth of pipe of test tube (1), the second tool that the 4th rubber stopper (12) jam-pack with the second syringe (13) is equipped with sodium carbonate solid (15) props up the mouth of pipe of test tube (11), the left end mouth of pipe of the U-shaped pipe (5) of the second rubber stopper (6) the jam-pack two end band arm with the first long neck funnel (7), the lower end mouth of pipe of the first long neck funnel (7) is inserted into bottom the left end of U-shaped pipe (5) of two end band arms, the right-hand member mouth of pipe of the U-shaped pipe (5) of the 3rd rubber stopper (8) the jam-pack two end band arm with the second long neck funnel (9), the lower end mouth of pipe of the second long neck funnel (9) is inserted into bottom the right-hand member of U-shaped pipe (5) of two end band arms.
2. a kind of sodium carbonate as claimed in claim 1, contrast experiment's device of sodium bicarbonate and hydrochloric acid reaction, be primarily characterized in that: the piston pressing two syringes, first syringe (3), the inner hydrochloric acid of second syringe (13) instills the first tool respectively and props up test tube (1) and the second tool props up in test tube (11), first tool props up U-shaped pipe (5) left end that sodium bicarbonate and hydrochloric acid reaction produce in test tube (1) gas enters two end band arms, gas pressure intensity increases, U-shaped pipe (5) the left end liquid level of two end band arms declines, liquid level in first long neck funnel (7) rises, second tool props up U-shaped pipe (5) right-hand member that sodium carbonate and hydrochloric acid reaction produce in test tube (11) gas enters two end band arms, and gas pressure intensity increases, U-shaped pipe (5) the right-hand member liquid level decline of two end band arms, the liquid level rising in the second long neck funnel (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520543816.9U CN204759876U (en) | 2015-07-26 | 2015-07-26 | Contrast experimental apparatus of sodium carbonate, sodium bicarbonate and hydrochloric acid reaction |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520543816.9U CN204759876U (en) | 2015-07-26 | 2015-07-26 | Contrast experimental apparatus of sodium carbonate, sodium bicarbonate and hydrochloric acid reaction |
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| CN204759876U true CN204759876U (en) | 2015-11-11 |
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| CN201520543816.9U Expired - Fee Related CN204759876U (en) | 2015-07-26 | 2015-07-26 | Contrast experimental apparatus of sodium carbonate, sodium bicarbonate and hydrochloric acid reaction |
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| CN (1) | CN204759876U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106710401A (en) * | 2015-07-26 | 2017-05-24 | 林师龙 | Comparative experiment device of reaction of sodium carbonate and hydrochloric acid and reaction of sodium bicarbonate and hydrochloric acid |
-
2015
- 2015-07-26 CN CN201520543816.9U patent/CN204759876U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106710401A (en) * | 2015-07-26 | 2017-05-24 | 林师龙 | Comparative experiment device of reaction of sodium carbonate and hydrochloric acid and reaction of sodium bicarbonate and hydrochloric acid |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151111 Termination date: 20160726 |
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| CF01 | Termination of patent right due to non-payment of annual fee |